x/x+1 =xy/( )(y不等于0) 3xy/x平方-2x=( )/(x-2)
问题描述:
x/x+1 =xy/( )(y不等于0) 3xy/x平方-2x=( )/(x-2)
x-y/x+y=( )/(x平方-y平方)(x-y不等于0) a平方-ab/ab=(a-b)/( )
答
x/x+1 =xy/[y(x+1 )]
3xy/x平方-2x=(3y )/(x-2)
x-y/x+y=(x-y )^2/(x平方-y平方)
a平方-ab/ab=(a-b)/( b)